I have the 55 on the rear of mine. It is nice to have all the room. The side bags are givi on mine though so I don't know about fitting with oem. You can't tell they are back there when riding. It doesn't weigh as much as a passenger would.
thx for the advice guys, i almost bought a givi topcase :( i guess the only option to do topcase will be to get oem honda ones which is gonna cost an arm and a leg ..dang :(
Sorry can't help you with the side cases query, I never got them. I only have the factory top box which is the same as one Givi model. I don't find it very noticeable when loaded and riding. You do have to be mindful of the extra weight when parking (especially if you need to push the bike out of where you're parked, so always park so you can ride away). Oh and watch out if you're on the centre stand as it is easier to rock the bike back onto the wheel if you're mucking about at the top box.